Geometry

Question Analysis:
This question tests whether students can identify sequences of only rigid motions that maintain congruence.
The main focus is on selecting a transformation pair that preserves size and shape.

Key Concept Explanation:
Rigid motions include:
Translation
Rotation
Reflection
These do not change the figure’s size or shape.
Dilation is not rigid — it changes size.

Step-by-Step Solution:
Only rotation + reflection includes two rigid motions.
All other choices involve dilation, which alters size.

Option Analysis:
A. Translation + dilation → ❌ Dilation changes size.
B. Rotation + reflection → ✅ Both are r...